Woman, I know he's late to all the realizations, but you yourself are aware that the one that ultimately fucked you over is really the emperor. Both the second prince and Florentia where unborn kids when the emperor, and even the previous one, were messing everything up with their politics and d*k. In this instance, your foolish brother is right.
I also really love how they tend to dress Florentia in green when she's on family business, but on red when she's wielding/proclaiming her own personal powers